C5 X7 rear tyre wear
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Thread: C5 X7 rear tyre wear

  1. #1
    UFO
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    Default C5 X7 rear tyre wear

    My C5 is approaching 150k km and still running fine, except for the way it wears rear tyres. I'm wondering if others have experienced similar and if so how did you rectify it.

    Most of the distance the car travels is on highways and usually with light load.

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    The front tyres wear fine - even tread wear. All tyres run at 35psi and are checked regularly.

    The rears wear the inside edge well before the outside edge is (seemingly) even much past halfway.

    Any worthwhile ideas please?
    Craig K
    2009 C5 HDi Exclusive

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    Rotate! The front will scrub the outside edge off, leaving you with a beautiful, evenly worn tyre.

    I guess you could check the alignment and for sloppy bushes at the rear if you think this wear pattern is something that has changed over time.

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    Rotate! And listen to the music from the pressure sensors.........

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    1000+ Posts Greg C's Avatar
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    Rotate, but rotate regularly. i.e. Rotate, rotate every 10k, of course always on the same side but I am sure you know that. However there maybe something worn in the rear suspension, who knows. I think the only way to know for sure is take it to someone with a good alignment gauge and see if all factors are within spec.
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    UFO
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    Alright - but I hate rotating tyres. Better learn to love it again.

    It's getting a new pair prior to Cit In.

    Thanks for all your advice.
    Craig K
    2009 C5 HDi Exclusive

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    what variety might you be using ? Last set on my C5 was Continental .....thought they were good, and at about $50 a Tyre cheaper than Michelin ...that makes them even better. See you in Nuriootpa.

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    UFO
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    I run Kumhos at present and have been very pleased with them. Quieter than the original Michelins and wear better than the Bridgestones I had on. Come in around $245 each I think.
    Craig K
    2009 C5 HDi Exclusive

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    Our 307 did the same thing from new...

    Alec

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    1000+ Posts Greg C's Avatar
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    I hate rotating tyres as well. Only gets done on the Prius as it is part of the service. I swapped tyres on our Xantia to get a bit more out of the set and to compensate for different wear patterns. Lasted 2 days, the noise was unbearable.
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    con
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    Craig,

    which Kuhmos? I need to get a set for my C5


    thanks

    con...

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    UFO
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    I'll try to remember to look tomorrow and let you know.
    Craig K
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    Quote Originally Posted by UFO View Post
    My C5 is approaching 150k km and still running fine, except for the way it wears rear tyres. I'm wondering if others have experienced similar and if so how did you rectify it.

    Most of the distance the car travels is on highways and usually with light load.

    The front tyres wear fine - even tread wear. All tyres run at 35psi and are checked regularly.

    The rears wear the inside edge well before the outside edge is (seemingly) even much past halfway.

    Any worthwhile ideas please?
    If they're wearing the inside edge then (assuming that they don't have -ve camber) they're toeing out & the cause of that (if the C5 can be 4 wheel aligned & has had that done - to no avail) is that something is bent or, more likely, the locating bushes are worn & allowing the undriven rear wheels to drag back into toeout. 150k kilometres is rather premature wear but...

    Solution: rebush.

    Rotating is always wise for three reasons:
    One's to even wear (as others have noted).
    Another is to ensure that the least wearing tyres (usually the rears on a FWD car) don't continue to be used past a sensible tyre age.
    The last (related to the second) is so that tyres can be replaced in optimal sets of four having all worn out at the same time.

    cheers! Peter
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    1000+ Posts Ken W's Avatar
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    Hi Craig,

    My C5X7 is at 110kkm and rear tyres (2nd set) look to be wearing evenly. I would also suggest your car must have gone into toe-out on the rear but I see Peter has beaten me to it.

    Here follows a Google translate of the rear suspension chart in the 2008 C5X7 Mechanics Handbook

    445
    VALUES CONTROL AND ADJUSTMENT AXLE GEOMETRY
    Train "REAR"
    Rear axle suspension "Hydraulics"
    Control values
    Tires 225/60 R16-225 / 55 R17-245 / 45 R18-245 / 40 R19
    All Types engines
    Tracking, Adjustable, 0 ° 34 '± 0 ° 09'
    Camber, not adjustable, - 1 ° 16 '± 0 ° 30'
    Pushed angle, not adjustable, 0 ° ± 0 ° 30 '

    Asymmetry camber: ± 0 ° 30 '

    So perhaps it needs its tracking adjusted.

    Cheers and looking forward to catching up in Nuriootpa.

    Ken W

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    UFO
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    Quote Originally Posted by con View Post
    Craig,

    which Kuhmos? I need to get a set for my C5


    thanks

    con...
    Finally got around to checking - sorry for the delay.

    Kumho Ecsta LX Platinum 245/45 ZR18 100W
    Craig K
    2009 C5 HDi Exclusive

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    con
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    Quote Originally Posted by UFO View Post
    Finally got around to checking - sorry for the delay.

    Kumho Ecsta LX Platinum 245/45 ZR18 100W


    Thank you Craig,

    much obliged for the for the information.

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    Quote Originally Posted by con View Post
    Thank you Craig,

    much obliged for the for the information.
    I'm not sure what criteria you wish your tyres to satisfy but be warned that the LX KU27 is a long wear, low noise, high comfort specification. (And Craig singles out wear and quietness as merits.) The "flip side" of that is normally soggy handling response & low wet-grip. You might not much care but if you do prioritise a taut handling tyre with good wet grip, then a wonderful set of options is available in 245/45-18.

    Top specification sports tyres like the Pilot Super Sport & P Zero perhaps won't suit something like the C5 but what of Conti's not overly harsh SportContact 5 or Michelin's PS3? Or, given that a "4 for the price of 3" deal is current for Bridgestones at the moment (expires end of April) how about the just released Adrenalin RE003 (which sounds very good)? Or Dunlop's Sport Maxx RT or Goodyear's Eagle F1 Asymmetric 2? Or, a step down from all of the above but a step or three up from the KU27, Pirelli's Cinturato P7?

    Anyone using this size is blessed with good choices. Personally, I'd take advantage of the deal & get the RE003.

    cheers! Peter
    Last edited by 4cvg; 15th March 2015 at 10:34 PM.
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  17. #17
    con
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    thanks for the comments, Peter. I need to decide whether comfort or handling is more suited to my needs.

    cheers

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